Called subscriber identification

A called subscriber identification (abbreviated CSID) is a string that identifies a specific fax machine as the recipient of a fax. This string (typically less than 40 characters) is usually a combination of the fax machine's telephone number and identification of the fax machine's user.

Source: Wikipedia — Called subscriber identification (CC BY-SA 4.0)

Called subscriber identification

A called subscriber identification (abbreviated CSID) is a string that identifies a specific fax machine as the recipient of a fax. This string (typically less than 40 characters) is usually a combination of the fax machine's telephone number and identification of the fax machine's user.

Source: Wikipedia "Called subscriber identification" · CC BY-SA 4.0

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